A Patient with Pneumonia and Underlying COPD Is Being Mechanically

A patient with pneumonia and underlying COPD is being mechanically ventilated in the VC-CMV mode with Vᴛ 650 mL.The resulting PₐCO₂ is 62 mm Hg.What change should be made to the Vᴛ to obtain a desired PₐCO₂ of 50 mm Hg for this patient?

A) 400 mL
B) 800 mL
C) 1000 mL
D) 1200 mL